| 摘要 |
A screen assembly comprising a roll carrying screening material such as flyscreen material, a pair of guides at opposite sides of said roll and receiving opposite edges of said material and a strengthening element fixed for movement with the screen material and extending parallel to the roll, the strengthening element being formed of thin resilient non-extensible material. The element has an arcuate cross section to enable it to be rolled up onto the roll and apertures or slots at either end for engagement over guide tracks in the opposite guides.
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